Lagler HUMMEL Operation, Maintenance And Safety Manual

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BELT SANDING MACHINE HUMMEL

Operation,

Maintenance, Safety

Translation of original operating instructions

mg/m³

for the belt sanding machine

HUMMEL

English / Englisch

00.100.20.002 01.12.2012

*00.100.20.002*

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Lowering lever

Handle

Guide tube

HUMMEL® - ASSEMBLIES

Cable support with

strain relief ring

Dust bag

Drive motor

Safety guard

Lateral wheel

Side cover

Fig. 1 Assemblies of the HUMMEL® belt sanding machine

ON/OFF switch

Switch box

Operating lever,

drive unit

Bracket

Belt guard

Bumper felt

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1 Introduction .....................................................................................................................................................................4

1.1 Features of the machine ................................................................................................................................................4

1.2 Description of the machine ...........................................................................................................................................4

1.3 Intended use of the machine .........................................................................................................................................4

1.4 Safety devices.................................................................................................................................................................4

2 Hazard warnings and safety instructions ....................................................................................................................5

2.1 Hazard warnings .............................................................................................................................................................5

2.2 General safety instructions ...........................................................................................................................................8

3 Technical data ...............................................................................................................................................................10

4 Commissioning ..............................................................................................................................................................12

4.1 Preparing the machine for operation .........................................................................................................................12

4.2 Connecting the power cable .......................................................................................................................................15

4.3 Switching on the machine ...........................................................................................................................................16

4.4 Switching off the machine ...........................................................................................................................................18

5 Working with the HUMMEL® .......................................................................................................................................19

5.1 Application tips ............................................................................................................................................................. 19

5.2 Changing the sanding belt ...........................................................................................................................................20

5.3 Regulating the sanding drum pressure ......................................................................................................................22

5.4 Emptying the dust bag ..................................................................................................................................................23

6 Transport and storage ..................................................................................................................................................24

6.1 Dismantling the machine before transportation .......................................................................................................25

6.2 Assembly after transportation ....................................................................................................................................27

6.3 Storage ..........................................................................................................................................................................28

7 Maintenance work and replacement of wearing parts ............................................................................................29

7.1 Cleaning and care instructions ...................................................................................................................................30

7.2 Lubrication ....................................................................................................................................................................33

7.3 Checking and setting the sanding belt tracking ........................................................................................................33

7.4 Checking the machine setting .....................................................................................................................................36

7.5 Checking the dust pick-up ...........................................................................................................................................38

7.6 Replacement of sanding drum ....................................................................................................................................38

7.7 Replacement of tensioning roller ................................................................................................................................39

7.8 Replacement of rear wheel .........................................................................................................................................41

7.9 Replacement of lateral wheels ................................................................................................................................... 42

7.10 Replacement and tensioning of V-belts ..................................................................................................................... 42

8 Regular maintenance and testing in accordance with accident prevention regulations ....................................46

9 Causes of faults ............................................................................................................................................................48

10 Circuit diagrams ............................................................................................................................................................53

11 Spare parts .................................................................................................................................................................... 56

12 Service passport ...........................................................................................................................................................71

13 EU Declaration of conformity ...................................................................................................................................... 72

WARNING!

CAUTION!

ATTENTION! An undesired event can occur if the corresponding instructions are not followed!

HUMMEL® 01.12.2012 English / Englisch

Death, severe physical injury or significant property damage can occur if the corresponding cautionary measures are not taken!

Moderate to light physical injury or property damage can occur if the corresponding cautionary measures are not taken!

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INTRODUCTION

Introduction

You have purchased a high-quality product from LÄGLER®. We wish you a great deal of success with your HUMMEL®. All LÄGLER® products are subjected to a thorough inspection before leaving the factory.

Please read these operating instructions completely before you begin working with your HUMMEL®. These operating instructions include important information on occupational safety and will provide you with answers to many questions so that you can work with the machine safely and without any problems. If you cannot find a specific subject in these operating instructions, please read the LÄGLER® application technique guidelines “Sanding of wooden floors” (http://www.laegler.com) or contact our service department, your retailer or your importer.

1.1 FEATURES OF THE MACHINE

Figure 1 (page 2) shows the most important assemblies which make up the HUMMEL®. We recommend that you take some time to become familiar with the machine.

1.2 DESCRIPTION OF THE MACHINE

The HUMMEL® belt sanding machine operates with a contact sanding drum featuring a specially profiled rubber coating. The belt tensioning fixture with integrated automatic belt guidance is located vertically above the sanding drum. The work zone is covered by the machine housing and detachable side cover. On the machine housing, the electric motor is fixed in a motor bearing bracket. The plug for connection to the mains is located at the switch box of the motor. The motor switch with the switch positions START / WORKING and TEST is located at the switch box. On the left under the belt guard is the belt drive unit. The machine is moved by means of a steering wheel at the back and two lateral wheels. Two handles are attached to the guide tube, where the drum lowering lever is also located and the cables and dust bag are attached.

WARNING!

RISK OF DEATH from electrical shock:

The machine may never be used for wet processing operations of any kind!

1.3 INTENDED USE OF THE MACHINE

The HUMMEL® belt sanding machine is suitable for dry sanding wooden and cork floors, plastic skating rinks and tartan running tracks. A specially equipped version of the machine can be used to sand sheet metal surfaces.

Any application other than that described here is inadmissible without the consent of the manufacturer!

1.4 SAFETY DEVICES

The following parts of the machine are safety devices and must accordingly be kept in perfect working order:

Sealing felt = Dust shield Side cover = Dust shield, sanding belt protection Machine housing = Sanding belt protection Belt guard = V-belt protection

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HAZARD WARNINGS AND SAFETY INSTRUCTIONS

Hazard warnings and safety instructions

2.1 HAZARD WARNINGS

WARNING!

RISK OF DEATH from suffocation and RISK OF INJURY:

• Never wrap the power cable around your neck or other parts of the body!

RISK OF DEATH from electrical shock:

• The machine may never be used for wet processing operations of any kind!

• Do not expose the machine to rain! Do not use the machine in moist or wet environments!

• To protect yourself and the machine against faults in the mains supply use a safety switch (for German mains supply Part number in Section 11, Spare parts)!

Note the valid regulations and legal conditions in your

country!

• The machine must be switched off and the power plug must be removed from the socket during all maintenance work and work on the electrical equipment!

RISK OF DEATH, RISK OF INJURY, RISK OF FIRE:

• Be certain to read the hazard warnings and safety instructions before using the machine!

• Instruct your co-workers and colleagues accordingly! Otherwise, these persons could be exposed to danger or injured!

ATTENTION!

• Keep these hazard warnings and safety instructions in a safe place!

• Note the valid regulations and legal conditions in your country!

• Avoid body contact with grounded parts, e.g. pipes, radiators, ovens, refrigerators!

• The quality of the motor cable and the power cables must match the quality of the original LÄGLER® cable!

• The power cables must be protected from mechanical and/ or electrical damages in the workplace!

• Do not carry or pull by the machine by the cable! Do not pull on the cable to remove the plug from the socket! Protect the cable against heat, oil and sharp edges!

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HAZARD WARNINGS AND SAFETY INSTRUCTIONS

WARNING!

RISK OF EXPLOSION due to sparks while sanding or a high dust concentration in the air:

• Do not use the machine near

- sources of fires,

- flammable liquids or gases,

- potentially explosive areas!

• Do not smoke in a dusty environment, e.g. while sanding or emptying the dust bag!

RISK OF FIRE from spontaneous combustion or from sparks while sanding:

• There is a high risk of fire when sanding woods with a large amount of resin, oiled or waxed floors or metal! Therefore, the machine must always be cleaned carefully directly after sanding! Be certain to note the warning notices of the paint, oil and wax manufacturers!

• Cloths, pads, et cetera which have been immersed in oil or wax can spontaneously combust! Be certain to note the warning notices of the paint, oil and wax manufacturers!

• The dust bag must always be removed from the machine after sanding and emptied into a non-combustible container outdoors! Cover this container with a non-combustible cover and be certain to store it and the dust bag outdoors ( Section 5.4, Emptying the dust bag)!

RISK OF FIRE from the overheating of the cables:

• Only the following motor cables and power cables may be used:

- machines with motor for mains voltage 220 V or 230 V:

3 wires with wire cross-sections of at least 2.5 mm²

- machines with motor for mains voltage 400 V:

5 wires with wire cross-sections of at least 1.5 mm²

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HAZARD WARNINGS AND SAFETY INSTRUCTIONS

WARNING!

HEALTH RISK caused by dust:

• Make sure that the dust bag is properly fastened to the machine!

• If the machine is operated correctly, the mandatory dust emission values will not be exceeded! When emptying the dust bag outdoors, a respiratory protective mask (at least filter class P2) must be worn!

• A respiratory protective mask (at least filter class P2) must be worn when conducting other work that creates dust, e.g. cleaning of the machine!

CAUTION!

RISK OF INJURY and RISK OF PROPERTY DAMAGE from rotating tools and parts of the machine:

• Before switching on the machine, make sure that all tools and adjustment tools have been removed from the machine!

• The machine may not be started when tilted backward or forward!

• The machine may not be started if the sanding drum is on the floor!

• Do not reach into rotating tools or parts of the machine!

• Do not let children or other persons touch the machine or cable and keep them out of the work area!

• Do not wear any long articles of clothing or jewellery! These could be caught by moving parts!

RISK OF INJURY and RISK OF PROPERTY DAMAGE from unintentional starting of the machine:

• The power plug must be removed from the socket when the machine is switched off!

• Make sure that ON/OFF switch is not set to ON when connecting the machine to the mains supply!

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HAZARD WARNINGS AND SAFETY INSTRUCTIONS

CAUTION!

RISK OF INJURY and RISK OF PROPERTY DAMAGE from the rolling away, tipping or falling of the machine:

• The machine must be secured against rolling away, tipping or falling when not in use!

Always ensure that the machine is standing securely!

RISK OF INJURY and RISK OF PROPERTY DAMAGE from unsuitable parts:

• Only use tools, accessories and spare parts from LÄGLER® for the HUMMEL® ( Section 11, Spare parts)! There is no

guarantee for external parts or liability for damage caused by them!

HEALTH RISK caused by noise:

• Use hearing protection when conducting work that produces noise!

RISK OF PROPERTY DAMAGE:

• Do not store the unused machine on the sanding drum! Otherwise the sanding media can cause scratches on the ground or the sanding drum can be damaged!

• Improper transport will result in damage to the machine!

2.2 GENERAL SAFETY INSTRUCTIONS

• Provide good illumination in the workplace!

Well lit construction sites reduce the risk of injury and allow

you to better evaluate the quality of your work.

• Keep your work area clean!

Untidy work area create a risk of accidents.

• Use the proper machines!

Do not use low-performance machines or additional devices

for heavy jobs. Do not use the machine for purposes and work that it is not intended for.

• Do not overload the machines!

It works better and more safely in the power range noted.

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HAZARD WARNINGS AND SAFETY INSTRUCTIONS

• Do not bend too far over the machines! Avoid unnatural postures. Make sure that you stay in a stable

position and keep your balance at all times.

• Be attentive! Pay attention to your work. Work carefully and do not use the

machines if you are not concentrating.

• Maintain your machines with care! Keep your machines clean so that you can work better and

more safely. Follow the maintenance guidelines and the instructions for replacing tools. Regularly inspect the cable and have it replaced by a qualified electrician if it is damaged. Inspect the extension cable regularly and replace it if it is damaged. Keep the handles dry and free of oil and grease.

• Check your machines for damage! Before using the machines, you must inspect the safety

devices or damaged parts carefully to ensure that they are working perfectly and as intended. Check whether the moving parts are working properly, that they are not sticking, that no parts are broken, whether all parts are in perfect condition and installed properly and whether all other conditions which could influence the operation of the machine are in order.

Damaged safety devices and parts must be properly repaired

or replaced by an authorized service shop insofar as nothing to the contrary is indicated in the operating instructions. Damaged switches must be replaced by a qualified electrician. Do not use the machine if it cannot be started or switched off by using its switch.

• Store your machines safely! Store your unused machines in a dry, closed location out of

the reach of children!

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Technical data

NOTE on noise emission:

The values indicated are emission values and must not represent safe workplace values as well. Although a correlation exists between emission levels and immission levels, it is not always possible to determine whether additional precautionary measures are required. Factors that can have an effect on the immission level existing at the workplace include the duration of the effects, the characteristics of the work area and other sources of noise, e.g. the number of machines and processing operations in the vicinity. The permissible workplace values may also vary from country to country. This information, however, is intended to enable the user to better estimate the dangers and risks.

TECHNICAL DATA

Manufacturer ....................................................... Eugen Lägler GmbH

Machine type .................................................... belt sanding machine

Serial number ................................................................see type plate

Year of manufacture......................................................see type plate

Motor type .......................................................single-phase AC motor

- Voltage ................................................................230 V | .......... 220 V

- Frequency ............................................... 50 Hz (CPS) | 60 Hz (CPS)

- Output .............................................................. 2.2 kW | ........2.9 kW

- Necessary fuse protection of mains supply .....16 A | ............20 A

- Starting capacitor .............................................60 µF | ........ 130 µF

- Running capacitor ............................................. 40 µF | .......... 40 µF

Motor type ........................................................ three-phase AC motor

- Voltage ........................................................................................ 400 V

- Frequency ........................................................................50 Hz (CPS)

- Output .......................................................................................4.0 kW

- Necessary fuse protection of mains supply .............................16 A

Insulation class ...................................................................................B

Protection class ............................................................................IP 54

Safety devices ......................................................no-voltage release,

temperature switch as overload protection in the motor

NOTE:

The motor data indicated here refers to machines used in Germany or USA. Exported machines may have other data that can be seen on the motor type plate.

Drum diameter .......................................................175.5 mm (~ 6 7/8“)

Drum width ................................................................200 mm (~ 7 7/8”)

Drum speed ................................................................ 2400 1/min (rpm)

Dimension of the sanding belt ...... 200 x 750 mm (~ 7 7/8” x 29 1/2”)

Overall length of the machine ................................... 1040 mm (~ 41“)

Overall width of the machine ......................................360 mm (~ 14“)

Overall height of the machine ............................. 1020 mm (~ 40 1/8“)

Weight of the machine housing ..................................41 kg (~ 90 lbs)

Weight of the motor .....................................................34 kg (~ 75 lbs)

Weight of the guide tube .................................................4 kg (~ 9 lbs)

Overall weight of the machine ..................................79 kg (~ 174 lbs)

Dust emissions at workplace .............. < 1 mg/m³ (~ 0.012 gr./cu.yd.)

(measured as per the testing requirements GS-HO-15 of German statutory accident insurance DGUV)

Workplace-related noise emission values ...........................76 dB(A)

Measurement uncertainty constant of the

noise emission values ............................................................4 dB (A)

Vibration total value ahv ........................................................< 2.5 m/s²

(measured at the handle)

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TECHNICAL DATA

Intended applications

Sanding wooden and cork floors, plastic skating rings, with special version also machining of sheet metal surfaces.

WARNING!

Basic equipment

Machine ready for operation, dust bag, MultiClip for dust bag fixture, cable support, 10 m extension cable 3 x 2.5 mm² (or 5 x 1.5 mm² for three-phase AC motor), O-ring as a strain relief device, operating instructions with safety remarks, tool kit complete with closed mouth wrench size 13/10 mm, open-mouth wrench size 17 mm, hexagonal socket wrench size 4 mm, 5 mm and 6 mm, setting fixture, box wrench and respiratory protection mask P3.

Optional equipment

Carrying handle, TransCart, pocket for ear plugs, safety switch for fault current PRCD-S (for German mains supply), safety belt.

Wearing parts

Please check the condition of the wearing parts mentioned below at regular intervals in order to be able to work safely and optimally at all times.

Replace the following parts in case of wear and/or damage:

• Extension cable

• Motor cable

• Sealing felt

• MultiClip

• V-belts

• V-belt pulleys

• Belt tensioner

• Sanding drum (after daily use, exchange every 1 - 2 years)

• Tensioning roller of the drive unit (after daily use, exchange every 1 - 2 years)

• Guide rollers at the drive unit

• Guide roller at the machine housing

• Side cover

• Dust bag

• O-ring used as a strain relief

• Back wheel

• Lateral wheels

RISK OF DEATH from electrical shock:

The machine may never be used for wet processing operations of any kind!

NOTE:

You will find the corresponding part numbers for the optional equipment and wearing parts in Section 11, Spare parts.

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Commissioning

Fig. 2 When inserting the guide tube, make sure that

the upper rod of the lowering mechanism feeds in correctly!

COMMISSIONING

This section describes the procedure for commissioning the HUMMEL® on site. In order to exclude the possibility of damage and malfunctions, it is essential to proceed in the sequence outlined below.

CAUTION!

RISK OF INJURY and RISK OF PROPERTY DAMAGE:

Before working with the machine for the first time, operating staff must be adequately instructed!

4.1 PREPARING THE MACHINE FOR OPERATION

Fig. 3 After inserting the guide tube, carefully tighten

the wing screw at the lower rod.

Fig. 4 After inserting the guide tube, carefully tighten

the wing nut at the machine housing.

1 Unpack the machine carefully. The bottom part of the supplied

transport crate makes a useful container for storage or transportation of the machine ( Section 6, Transport and storage). Please ensure that the packaging materials are responsibly disposed of.

2 Press the lowering lever at the handle downwards (Fig. 2, 1.).

3 Insert the guide tube into the opening in the machine housing

and at the same time insert the upper rod into the lower rod (Fig. 2, 2).

4 Carefully tighten the wing screw at the lower rod (Fig. 3) and

the wing nut at the machine housing (Fig. 4).

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COMMISSIONING

5 Lift the sanding drum off the floor by turning the lowering

lever at the handle upwards (Fig. 5).

6 Hook the cable support into the bracket at the top of the guide

tube (Fig. 6)

7 Fasten the dust bag firmly using the cord and the MultiClip

at the end of the guide tube (Fig. 7). Ensuring when mounting that the opening of the guide tube is not closed.

8 Release the cover lock (Fig. 8, 1.) and remove the side cover

on the right of the machine housing (Fig. 8, 2.).

9 Pull the operating lever of the drive unit upwards (Fig. 8, 3.).

This will lower the tensioning roller.

10 Position the sanding belt on the tensioning roller of the drive

unit (Fig. 9) and push it over the tensioning roller and the sanding drum (Fig. 10).

Fig. 5 Lift the sanding drum off the floor by turning the

lowering lever at the handle upwards.

Fig. 6 Hook the cable support into the bracket at the

guide tube.

HUMMEL® 01.12.2012 English / Englisch

Fig. 7 Mount the dust bag using the cord (1.) and the

MultiClip (2. and 3.) at the end of the guide tube.

Fig. 9 Position the sanding belt on the tensioning roller

of the drive unit.

Fig. 8 Release the cover lock (1.), remove the side

cover (2.) and lower the tensioning roller by pulling up the operating lever (3.).

Fig. 10 Push the sanding belt far enough over the sanding

drum and tensioning roller so that the sanding drum is fully covered by the sanding belt.

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Fig. 11 Position the sanding belt so that it evenly covers

the sanding drum (A). Avoid position B without

fail (risk of fire)!

COMMISSIONING

11 Position the sanding belt so that it evenly covers the sanding

drum (Fig. 11, A).

WARNING!

RISK OF FIRE from the formation of sparks while sanding:

Position B of the sanding belt in Fig. 11 provoke sparking during sanding! Avoid this without fail!

12 To tension the sanding belt, press the operating lever of the

drive unit downwards (Fig. 12). Otherwise, damage or injury can occur!

13 Connect the machine to the mains supply ( Section 4.2,

Connecting the power cable).

Fig. 12 Tension the sanding belt by lowering the operating

lever. Otherwise, damage or injury can occur!

Fig. 13 Mount the side cover.

CAUTION!

RISK OF INJURY and RISK OF PROPERTY DAMAGE from rotating parts of the machine:

• Always tension the sanding belt before switch on the machine (Fig. 12)!

• Always lift the sanding drum off the floor before switch on the machine (Fig. 14)!

14 Before sanding, the precise tracking of the sanding belt

must be checked! Adjusted it if necessary ( Section 7.3, Checking and setting the sanding belt tracking)!

CAUTION!

RISK OF INJURY and RISK OF PROPERTY DAMAGE from rotating parts of the machine:

• Never reach into the area of the sanding belt while it is

running!

• During the test run, ensure that no objects randomly positioned in the vicinity can be picked up by the sanding belt and no other persons are in the danger area!

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COMMISSIONING

15 After the checking and setting of the sanding belt tracking

mount the side cover (Fig. 13).

16 The machine is now ready for operation ( Section 4.3,

Switching on the machine).

4.2 CONNECTING THE POWER CABLE

WARNING!

RISK OF DEATH from electrical shock:

• To protect yourself and the machine against faults in the mains supply use a safety switch PRCD (for German mains supply Part number in Section 11, Spare parts)!

• Observe the applicable regulations and legal requirements for your country!

1 Lift the sanding drum off the floor by turning the lowering

lever at the handle upwards (Fig. 14).

2 Insert the plug of the motor cable in the coupler of the

extension cable (Fig. 15, 1.).

3 Fasten the strain relief ring on the extension cable (Fig. 15, 2.)

and mount the strain relief ring on the cable support (Fig. 16).

Fig. 14 Lift the sanding drum off the floor by turning the

lowering lever at the handle upwards.

Fig. 15 Insert the plug of the motor cable in the coupler

of the extension cable (1.). Fasten the strain relief ring on the extension cable (2.).

4 Plug in the extension cable to a adequately fused mains socket

with PE contacts.

HUMMEL® 01.12.2012 English / Englisch

Fig. 16 Mount the strain relief ring on the cable support.

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Fig. 17 To switch on the machine turn the switch button at

the motor to position -START- and hold the switch button for around 2 seconds in this position.

COMMISSIONING

4.3 SWITCHING ON THE MACHINE

CAUTION!

RISK OF INJURY and RISK OF PROPERTY DAMAGE from rotating parts of the machine:

• Always tension the sanding belt before switch on the machine (Fig. 12)!

• Always lift the sanding drum off the floor before switch on the machine (Fig. 14)!

• Never allow the machine to run unattended!

Fig. 18 Once the motor has reached its full speed,

release the switch button. The switch button will then automatically move to position -BETRIEB (WORKING)-.

Fig. 19 To switch on the machine turn the switch button

at the motor to position -START-.

4.3.1 MACHINES WITH SINGLE-PHASE AC MOTOR (MAINS VOLTAGE 230 V AND 220 V)

1 Lift the sanding drum off the floor by turning the lowering

lever at the handle upwards (Fig. 14)!

2 To switch on the machine turn the switch button at the motor

to position -START- and hold the switch button for around 2 seconds in this position (Fig. 17).

3 Once the motor has reached its full speed, release the switch

button. The switch button will then automatically move to position -BETRIEB (WORKING)- (Fig. 18).

ATTENTION!

Remaining for too long in the switch position -START- shortens the service life of the starting capacitor!

4.3.2 MACHINES WITH THREE-PHASE AC MOTOR (MAINS VOLTAGE 400 V)

Fig. 20 Release the switch button. The button turns

automatically in position -1-.

1 Lift the sanding drum off the floor by turning the lowering

lever at the handle upwards (Fig. 14)!

2 To switch on the machine turn the switch button at the motor

to position -START- (Fig. 19) and release the switch button after the motor has reached its full speed. The switch button will then automatically move to position -1- (Fig. 20).

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COMMISSIONING

If the motor do not start in the switch position -START- (Fig. 21, 1.) and the light on the switch box shines (Fig. 21, 2.), the rotation direction of the motor is wrong. To change the rotation direction of the motor using the following procedure:

1 Disconnect the motor cable from extension cable.

2 Put a screwdriver in the slit of the phase changing switch in

the plug of the motor cable (Fig. 22, 1.).

3 Original LÄGLER® plug with red nut at the cable outlet: To unlock the phase changing switch press the screwdriver

in the slit and at the same time turn the screwdriver at 180° (Fig. 22, 2.).

Original LÄGLER® plug with yellow nut at the cable outlet: To unlock the phase changing switch turn the screwdriver at

180° against a small resistance (Fig. 22, 2.).

Fig. 21 The motor do not start in switch position -START-

(1.) and the light on the switch box shines (2.).

ATTENTION!

The phase changing switch can only be turned in one direction!

4.3.3 GENERAL

If the motor should ever be difficult to start in extremely cold conditions proceed as follows:

1 Switch off the machine ( Section 4.4, Switching off

the machine) and remove the V-belts ( Section 7.10, Replacement and tensioning of V-belts).

2 Switch on the machine without V-belts ( Section 4.3,

Switching on the machine).

3 Once the motor is up to operating temperature, switch off

the machine ( Section 4.4, Switching off the machine) and mount the V-belts ( Section 7.10, Replacement and tensioning of V-belts).

Fig. 22 Change the rotation direction of the motor by

turning the phase changing switch at 180°.

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COMMISSIONING

4.4 SWITCHING OFF THE MACHINE

1 Before switch off the machine lift the sanding drum off the

floor by turning the lowering lever at the handle upwards (Fig. 23).

2 Turn the switch button to position -0- (Fig. 24).

3 Wait until the sanding drum comes to a standstill!

Fig. 23 Lift the sanding drum off the floor by turning the

lowering lever at the handle upwards.

Fig. 24 To switch off the machine turn the switch button

to position -0-.

CAUTION!

RISK OF INJURY and RISK OF PROPERTY DAMAGE:

• Always remove the power plug from the socket after you have switched off the machine!

• Secure the machine against sliding! For example, place a flat piece of wood between the floor surface and machine housing (Fig. 25).

ATTENTION!

Do not store the unused machine on the sanding drum! Otherwise the sanding media can cause scratches on the ground or the sanding drum can be damaged!

Fig. 25 Secure the machine against sliding!

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WORKING WITH THE HUMMEL

Working with the HUMMEL

5.1 APPLICATION TIPS

ATTENTION!

• Always sand from left to right! This ensures that the lefthand lateral wheel always runs over the newly sanded surface, making the surface more even with each sanding pass and preventing waviness!

• One sanding track comprises a forward and reverse movement over the same lane without offset!

• We advise a sanding track offset of 50%!

WARNING!

RISK OF DEATH from electrical shock:

The machine may never be used for wet processing operations of any kind!

• Deep sanding marks due to the selection of a too coarse grit grade can be prevented by starting the first sanding operation with the finest grit grade possible.

• Carry out a test sanding process using a 50 or 60 grit grade (a few test sanding tracks). If this test is satisfactory and you envisage a good sanding result within a reasonable period, it is more efficient to start the sanding work with these finer grit grade.

• Prevent sanding marks made by previously used grit grade by adhering to the order of the sandpaper grit grade and never skip more than one grit grade.

• Always vacuum the floor thoroughly before the first sanding operation and after each additional one.

• Clean the wheels of the machine before starting each new sanding operation.

• In order to avoid chatter marks, use sanding belts with bud joints and tape.

NOTE:

For more information free of charge, please contact: within Germany

- Telephone: 0800 / 52 34 537

- Fax: 0800 / 48 66 353 within the USA

- Telephone: 800-848-6635

- Telephone: 0049 - 7135 - 98 90 - 0

- Fax: 0049 - 7135 - 98 90 - 98

- E-mail: [email protected]

- Internet: http://www.laegler.com

You will also find important and interesting application tips in the LÄGLER® application technique guidelines “Sanding of wooden floors” (http://www.laegler.com)!

• After replacing the sanding belt, start working in poorly lit areas of the room in order to remove the initial aggressiveness of the sanding medium.

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WORKING WITH THE HUMMEL

Fig. 26 Lift the sanding drum off the floor by turning the

lowering lever at the handle upwards.

5.2 CHANGING THE SANDING BELT

Depending on the type of sanding process you wish to perform, different abrasive grit grades can be selected. In order to change the abrasive, proceed as follows:

1 Lift the sanding drum off the floor by turning the lowering

lever at the handle upwards (Fig. 26).

2 Switch off the machine and pull the power plug out of the

socket!

3 Release the cover lock (Fig. 27, 1.) and remove the side cover

on the right of the machine housing (Fig. 27, 2.).

4 To release the tension of the sanding belt, pull the operating

lever of the drive unit upwards (Fig. 27, 3.). This will lower the tensioning roller.

Fig. 27 Release the cover lock (1.), remove the side

cover (2.) and lower the tensioning roller by pulling up the operating lever (3.).

Fig. 28 Remove the sanding belt.

5 Remove the worn sanding belt from the tensioning roller and

the sanding drum (Fig. 28).

6 Position the new sanding belt on the tensioning roller of the

drive unit (Fig. 29) and push it over the tensioning roller and the sanding drum (Fig. 30).

Fig. 29 Position the new sanding belt on the tensioning

roller of the drive unit.

Fig. 30 Push the sanding belt far enough over the sanding

drum and tensioning roller so that the sanding drum is fully covered by the sanding belt.

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7 Position the sanding belt so that it evenly covers the sanding

drum (Fig. 31, A).

WARNING!

RISK OF FIRE from the formation of sparks while sanding:

Position B of the sanding belt in Fig. 31 provoke sparking during sanding! Avoid this without fail!

8 To tension the sanding belt, press the operating lever of the

drive unit downwards (Fig. 32). Otherwise, damage or injury can occur!

9 Connect the machine to the mains supply ( Section 4.2,

Connecting the power cable).

Fig. 31 Position the sanding belt so that it evenly covers

the sanding drum (A). Avoid position B without

fail (risk of fire)!

CAUTION!

RISK OF INJURY and RISK OF PROPERTY DAMAGE from rotating parts of the machine:

• Always tension the sanding belt before switch on the machine (Fig. 32)!

• Always lift the sanding drum off the floor before switch on the machine (Fig. 26)!

10 Before sanding, the precise tracking of the sanding belt

must be checked! Adjusted it if necessary ( Section 7.3, Checking and setting the sanding belt tracking)!

CAUTION!

RISK OF INJURY and RISK OF PROPERTY DAMAGE from rotating parts of the machine:

Fig. 32 Tension the sanding belt by lowering the operating

lever. Otherwise, damage or injury can occur!

• Never reach into the area of the sanding belt while it is

running!

• During the test run, ensure that no objects randomly positioned in the vicinity can be picked up by the sanding belt and no other persons are in the danger area!

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Fig. 33 Mount the side cover.

WORKING WITH THE HUMMEL

11 After the checking and setting of the sanding belt tracking

mount the side cover (Fig. 33).

12 It is now possible to execute the next sanding process with

the machine.

5.3 REGULATING THE SANDING DRUM PRESSURE

The lever can be used to set three different drum pressure stages. These three stages - COARSE / MEDIUM / FINE - are designated on the notch plate as -GROB / MITT. / FEIN- (Fig. 34).

The pressure stage indications relate to the grit grade sequence. The sanding pressure should be adjusted inline with the grit grade sequence and reduced as the fineness of the grit grade increases. This setting facility permits you to adjust the drum pressure to the prevailing circumstances.

Fig. 34 Different sanding pressure stages can be selected

using the setting lever.

GROB (COARSE) = high sanding pressure for coarse grit grade MITT. (MEDIUM) = middle sanding pressure for medium grit

grade

FEIN (FINE) = low sanding pressure for fine grit grade

In order to avoid dish-outs when sanding soft wood floors, the sanding pressure should be reduced and the sanding speed increased.

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5.4 EMPTYING THE DUST BAG

WARNING!

RISK OF FIRE from the formation of sparks while sanding:

• The dust bag must always be removed from the machine after sanding and emptied into a non-combustible container outdoors!

• Cover this container with a non-combustible cover and be certain to store it and the dust bag outdoors!

• Note the warning on the guide tube (Fig. 35)!

HEALTH RISK caused by dust:

In order to ensure that the dust values in the air do not exceed the prescribed threshold levels, please note:

Fig. 35 Note the warning on the guide tube!

• The dust bag must be emptied when it is one-third full at

the very latest in order to prevent a deterioration of the suction performance due to the lack of filtering surface area!

• Do not work with an overfilled dust bag!

• The dust bag must be emptied outdoors!

• When emptying the dust bag, wear a respiratory protective

mask (at least filter class P2)!

• Do not wash, patch or repair the dust bag in any other manner!

• Damaged dust bags must be replaced with new ones!

Use exclusively original LÄGLER® dust bags for the HUMMEL® (Part number in Section 11, Spare parts)!

1 Switch off the machine and pull the power plug out of the

socket!

2 Wear the respiratory protective mask (at least filter class

P2)!

3 Remove the MultiClip (Fig. 36, 1. and 2.) and open the cord at

the dust bag (Fig. 36, 3.).

4 Take the dust bag away and close it with the cord.

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Fig. 36 Remove the MultiClip (1. and 2.) and open the cord

at the dust bag (3.).

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TRANSPORT AND STORAGE

5 Empty the dust bag into a non-combustible container outdoors

and cover this container with a non-combustible cover (RISK OF FIRE)!

6 Fasten the empty dust bag firmly using the cord and the

MultiClip at the end of the guide tube. Ensuring when mounting that the opening of the guide tube is not closed. Wear the respiratory protective mask!

Transport and storage

Fig. 37 Transport or storage of the machine on a flat piece

of wood.

Fig. 38 Transport or storage of the machine on the bottom

part of the transport crate.

WARNING!

RISK OF INJURY and RISK OF PROPERTY DAMAGE:

In the event of transport in an automobile or similar machine, all parts must be secured against sliding!

RISK OF FIRE from spontaneous combustion or the formation of sparks while sanding:

• Oil or wax can lead to spontaneous combustion! Therefore, the machine must always be cleaned carefully before transport or storage!

• Always transport and store the machine without the dust bag! Store the used dust bag in a closed non-combustible container!

ATTENTION!

• During transport or storage, place a flat piece of wood between the floor surface and machine housing (Fig. 37)! This prevents the housing from slipping and stops the drum being in direct contact with the floor!

• During transport or storage, the machine can also be firmly lashed to the bottom part of the supplied transport crate using two belts (Fig. 38)! This will prevent damage to the sanding drum and stop the wheels becoming out of round!

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TRANSPORT AND STORAGE

6.1 DISMANTLING THE MACHINE BEFORE TRANSPORTATION

For transportation, the machine can be dismantled into three parts: Guide tube, motor and machine housing. During manual transport over roads and pavements, to protect the wheels and sanding drum, use the TransCart (Part number in Section 11, Spare parts).

1 Switch off the machine and pull the power plug out of the

socket!

2 Lift the sanding drum off the floor by turning the lowering

lever at the handle upwards (Fig. 39).

3 Empty the dust bag ( Section 5.4, Emptying the dust bag).

Fig. 39 Lift the sanding drum off the floor by turning the

lowering lever at the handle upwards.

4 Loosen the two motor nuts at the motor bearing bracket

(Fig. 40).

The motor nut must only be backed out from the fitting

between the motor nut and motor bearing bracket, and not completely removed (Fig. 41).

5 Open the belt guard (Fig. 42).

6 Release the tension of the V-belts by turning the eye bolt at

the motor counterclockwise (Fig. 43).

Fig. 40 Loosen the two motor nuts.

Fig. 41 Turn the two motor nuts out so far (1.) until the two

nuts used to fit into the motor bearing bracket are exposed (2.).

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Fig. 42 Pull the power plug out of the socket and open

the belt guard.

Fig. 43 Release the tension of the V-belts by turning the

eye bolt at the motor counterclockwise.

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TRANSPORT AND STORAGE

CAUTION!

RISK OF INJURY:

During dismantling and mounting the V-belts, take care of your fingers danger of crushing!

Fig. 44 Remove the suction V-belt.

Fig. 45 Allow the drive V-belt to run off the lower pulley.

If necessary, use the box wrench (see tool kit) to help you. Turn the pulley exclusively clockwise in order not to loosen the nut!

7 Turn the motor pulley and allow the suction V-belt to run off

the motor pulley (Fig. 44).

8 Turn the lower pulley and allow the drive belt to run off the

lower pulley (Fig. 45).

If necessary, use the box wrench (see tool kit) to turn the

lower pulley exclusively clockwise!

ATTENTION!

Only turn the nut with the box wrench at the lower pulley clockwise, as otherwise the nut will work loose (left-hand thread)!

9 Remove the motor from the machine housing (Fig. 46) and

secure it during transport against slipping and damage!

10 Press the lowering lever at the handle downwards (Fig. 47)

to lower the sanding drum onto the floor.

Fig. 46 Remove the motor from the machine housing.

Fig. 47 Press the lowering lever at the handle downwards

to lower the sanding drum onto the floor.

11 Open the wing screw at the lower rod (Fig. 48, 1.) and the wing

nut at the machine housing (Fig. 48, 2.)

12 Pull the guide tube out of the machine housing (Fig. 48, 3.).

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6.2 ASSEMBLY AFTER TRANSPORTATION

When assembling the HUMMEL® after transport, adhere to the following sequence of work steps:

1 Press the lowering lever at the handle downwards (Fig. 49, 1.).

2 Insert the guide tube into the opening in the machine housing

and at the same time insert the upper rod into the lower rod (Fig. 49, 2).

3 Carefully tighten the wing screw at the lower rod (Fig. 50) and

the wing nut at the machine housing (Fig. 51).

4 Lift the sanding drum off the floor by turning the lowering

lever at the handle upwards (Fig. 52).

Fig. 49 When inserting the guide tube, make sure that

the upper rod of the lowering mechanism feeds in correctly!

Fig. 48 After opening the wing screw (1.) and wing nut

(2.) which fasten the rod linkage, the guide tube can be drawn out of the machine housing (3.).

Fig. 50 After inserting the guide tube, carefully tighten

the wing screw at the lower rod.

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Fig. 51 After inserting the guide tube, carefully tighten

the wing nut at the machine housing.

Fig. 52 Lift the sanding drum off the floor by turning the

lowering lever at the handle upwards.

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TRANSPORT AND STORAGE

5 Place the motor in the motor bearing bracket (Fig. 53) and

tighten the two motor nuts slightly (Fig. 54).

6 Mount the V-belts and tension them by turning the eye bolt

at the motor clockwise (Fig. 55).

7 Tighten the two motor nuts (Fig. 54).

8 Close the belt guard (Fig. 56).

Fig. 53 Place the motor in the motor bearing bracket.

Fig. 54 Tighten the two motor nuts.

9 Mount the dust bag at he guide tube ( Section 4.1,

Preparing the machine for operation).

10 Connect the machine to the mains supply ( Section 4.2,

Connecting the power cable).

11 The machine is now ready for use.

6.3 STORAGE

WARNING!

RISK OF FIRE from the formation of sparks while sanding:

Always transport and store the machine without the dust bag! Store the emptied dust bag in a closed non-combustible container!

Fig. 55 Mount the V-belts and tension them by turning the

eye bolt at the motor clockwise.

Fig. 56 Close the belt guard.

If you wish to keep the machine in storage for a protracted period, ensure that it is kept dry and free of the influence of frost in a location without excessive temperature fluctuations.

Store your unused machine in a dry, closed location out of the reach of children!

ATTENTION!

When storing for long periods, place the machine on the bottom part of the supplied transport crate (Fig. 38)!This will prevent damage to the sanding drum and stop the wheels becoming out of round!

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MAINTENANCE WORK AND REPLACEMENT OF WEARING PARTS

Maintenance work and replacement

of wearing parts

WARNING!

RISK OF DEATH from electrical shock and RISK OF INJURY from rotating parts of the machine:

• All extensive maintenance work, especially on the electrical equipment, must be conducted by a qualified expert for safety reasons!

• All maintenance work must be conducted with the machine switched off and with the power plug removed from the socket!

ATTENTION!

• Only use original spare parts from LÄGLER®! This is the only way to ensure that your machine continues to perform! Warranty claims for third-party parts will not be honoured!

• Never conduct the maintenance work and replacement of wearing parts on the newly sanded wooden floor! You could cause scratches or other damage to the floor!

• Never use any cleaning products which contain solvents!

Periodically but at the latest when you notice that damage has occurred, a variety of maintenance procedures have to be performed. For this work, use exclusively original spare parts from LÄGLER®. Work in a clean, well lit location and proceed in accordance with these operating instructions. In the tool kit, you will find all the tools required to carry out the work described below.

It takes only a minimal amount of time to inspect the machine, but this precautionary measure can save subsequent complaints brought about by minor damage to the machine. Performing regular maintenance work will help to retain the value of the machine and is also in the interests of your own safety.

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MAINTENANCE WORK AND REPLACEMENT OF WEARING PARTS

7.1 CLEANING AND CARE INSTRUCTIONS

WARNING!

RISK OF FIRE from spontaneous combustion and the formation of sparks while sanding:

• There is a high risk of fire when sanding woods with a large amount of resin, oiled or waxed floors or metal!

• Therefore, the machine must always be cleaned carefully directly after sanding!

• Be certain to note the warning notices of the paint, oil and wax manufacturers!

Before starting work, you should perform the following care procedure in order to ensure that the machine is in full working order and produces the customary high-quality sanding finish:

• Check the tensioning roller and the sanding drum for damage. Clean the parts carefully and ensure that the rubber coating on the rollers is not damaged.

• Check the sanding belt tracking and adjust it if necessary using a grit grade 120 sanding belt ( Section 7.3, Checking and setting the sanding belt tracking).

• Check if the guide rollers at the drive unit and inside the machine housing are rotatable easily!

Guide rollers which are not rotatable easily provoke sparking

during sanding and must be replaced without fail (Part number in Section 11, Spare parts)!

• Clean the wheels of the machine.

• Check the tension of the V-belts and correct it if necessary with the aid of the eye bolt at the motor ( Section 7.10, Replacement and tensioning of V-belts).

• Check that the lowering rod linkage is easy running.

• Check the dust suction system and the dust bag for leaks and damages.

• Carry out a visual inspection of the electrical equipment (extension cable, plug, couplings).

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7.1.1 DISMANTLING AND CLEANING OF DRIVE UNIT

The drive unit should be removed and cleaned at least once a week if the machine is used every day.

ATTENTION!

A dirty drive unit avoids an ideal sanding belt adjustment! This cause negative effects to the sanding result!

The drive unit is removed using the following procedure:

1 Lift the sanding drum off the floor by turning the lowering

lever at the handle upwards (Fig. 57).

2 Switch off the machine and pull the power plug out of the

socket!

3 Release the cover lock (Fig. 58, 1.) and remove the side cover

on the right of the machine housing (Fig. 58, 2.).

4 Pull the operating lever of the drive unit upwards (Fig. 58, 3.).

This will lower the tensioning roller.

5 Remove the sanding belt from the tensioning roller and the

sanding drum (Fig. 59).

6 If you wish to remove the tensioning roller of the drive unit

( Section 7.7, Replacement of tensioning roller), press the operating lever of the drive unit downwards (Fig. 60).

Fig. 57 Lift the sanding drum off the floor by turning the

lowering lever at the handle upwards.

Fig. 58 Release the cover lock (1.), remove the side cover

(2.) and lower the tensioning roller by pulling up the operating lever (3.).

7 Remove the operating lever of the drive unit by unscrewing

(Fig. 61).

Fig. 60 Press the operating lever of the drive unit

downwards.

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Fig. 59 Remove the sanding belt.

Fig. 61 Unscrew the operating lever of the drive unit.

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MAINTENANCE WORK AND REPLACEMENT OF WEARING PARTS

8 Hold on the drive unit and remove the three screws at the

same time (Fig. 62)! Therefore the drive unit cannot fall on

the sanding drum.

9 Carefully remove the drive unit (Fig. 63) and clean it. Never

use any cleaning products which contain solvents!

WARNING!

Fig. 62 Hold on the drive unit and remove the three screws

at the same time.

Fig. 63 Carefully remove the drive unit.

RISK OF FIRE from the formation of sparks while sanding:

• The two guide rollers at the drive unit must be rotatable easily (Fig. 64)!

• Guide rollers which are not rotatable easily provoke sparking during sanding and must be replaced without fail (Part number in Section 11, Spare parts)!

10 Reassemble in reverse order.

11 After mounting the drive unit, check the precise tracking of

the sanding belt and adjust it if necessary ( Section 7.3, Checking and setting the sanding belt tracking)!

Regular exchange of the sanding drum and tensioning roller guarantees a constant degree of operating quality and performance. When working every day with the machine, they must be exchanged every 1 – 2 years, otherwise every 3 – 4 years ( Section 7.6,

Replacement of sanding drum and Section 7.7, Replacement of tensioning roller).

Fig. 64 The two guide rollers at the drive unit must

be rotatable easily! Otherwise they must be replaced!

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7.2 LUBRICATION

Machines up to year of manufacture 1997: For general upkeep of the machine, after around 100 operating hours

we recommend sparing lubrication of the two lubrication nipples at the wheel bearings using a manual grease gun (tool kit) using ball bearing grease.

ATTENTION!

In machines from year of manufacture 1998, the lubrication point at the wheel bearing has been replaced by a self-lubricating plastic bushing. This bushing does not require lubrication! Never use sprays such as WD 40 or similar!

In order to guarantee lasting easy running of the moving parts, lubricate at regular intervals at the following lubrication points (Fig. 65):

A Top part of the rod linkage at the lever plate B Lever plate on the handle shaft

To do this, tilt the machine slightly to one side and allow a small amount of oil to run into the lubrication points.

C Wing screw on the bottom part of the rod linkage D Guide tube in the machine housing E Wing nut at the machine housing

Use customary lubricating oil for these lubrication points - never use grease or sprays such as WD 40 or similar!

7.3 CHECKING AND SETTING THE SANDING BELT TRACKING

The sanding belt tracking must be checked every time the sanding belt is exchanged, but at least once a day!

Fig. 65 Lubrication points which should be regularly oiled.

CAUTION!

RISK OF INJURY and RISK OF PROPERTY DAMAGE:

During the test run, the sanding drum must be raised off the floor (Fig. 66)!

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MAINTENANCE WORK AND REPLACEMENT OF WEARING PARTS

7.3.1 CHECKING THE SANDING BELT TRACKING

1 Lift the sanding drum off the floor by turning the lowering

lever at the handle upwards (Fig. 66)!

2 Switch off the machine!

3 Release the cover lock (Fig. 67, 1.) and remove the side cover

on the right of the machine housing (Fig. 67, 2.).

Fig. 66 Lift the sanding drum off the floor by turning the

lowering lever at the handle upwards

Fig. 67 Release the cover lock (1.) and remove the side

cover (2.).

Fig. 68 Single-phase AC motor: Hold the switch button for around 2 seconds

in -TEST- position and control the sanding belt tracking at the same time. After this release the switch button.

CAUTION!

RISK OF INJURY and RISK OF PROPERTY DAMAGE from rotating parts of the machine:

• Never reach into the area of the sanding belt while it is running!

• During the test run, ensure that no objects randomly positioned in the vicinity can be picked up by the sanding belt and no other persons are in the danger area!

4 Machines with single-phase AC motor

(mains voltage 230 V and 220 V): Turn the switch button in position -TEST- and hold the switch

button for around 2 seconds in this position (Fig. 68). At the same time control the sanding belt tracking. After this release the switch button.

Machines with three-phase AC motor (mains voltage 400 V):

Turn the switch button in position -START- and hold the switch

button for around 2 seconds in this position (Fig. 69). At the same time control the sanding belt tracking. After this turn the switch button to position -0-.

Fig. 69 Three-phase AC motor: Hold the switch button for around 2 seconds in

-START- position and control the sanding belt tracking at the same time. After this turn the switch button in position -0-.

5 If the sanding belt runs to the front (towards A in Fig. 70) or

to the back (towards B in Fig. 70) the setting of the sanding belt regulation is necessary ( Section 7.3.2, Setting the sanding belt tracking). If the sanding belt tracking is alright, mount the side cover (Fig. 71).

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7.3.2 SETTING THE SANDING BELT TRACKING

Should the setting of the sanding belt tracking be necessary, proceed as follows:

1 Lift the sanding drum off the floor by turning the lowering

lever at the handle upwards (Fig. 66)!

2 Switch off the machine!

3 Release the cover lock (Fig. 67, 1.) and remove the side cover

on the right of the machine housing (Fig. 67, 2.).

4 Check whether any soiling at the tensioning roller calls for

readjustment. If so, the tensioning roller must be cleaned ( Section 7.1.1, Dismantling and cleaning of drive unit) and the sanding belt tracking must be checked again ( Section 7.3.1, Checking the sanding belt tracking).

5 Always set the sanding belt tracking using a sanding belt with

as fine a grit grade as possible (= flexible sanding belt). This is because the more flexible the sanding belt, the precisely it is possible to set the tensioning roller.

Mount the sanding belt ( Section 5.2, Changing the sanding

belt) and carry out a test run ( Section 7.3.1, Checking the sanding belt tracking).

If the sanding belt is running out of true (in direction of A

or B in Fig. 70), it must be turned around and another test performed.

Fig. 70 If the sanding belt runs in direction of A or B, the

setting of the sanding belt regulation is necessary.

Fig. 71 Mount the side cover.

If the sanding belt runs to the front (in direction of A in Fig. 70)

and after turning over runs to the back (in direction of B in Fig. 70) or vice versa, the sanding belt is of poor quality and is not usable (conical sleeve)!

If the sanding belt runs in the same direction both times, the

tensioning roller requires readjustment.

6 If readjustment of the tensioning roller is necessary, release

the lock nut at the drive unit (Fig. 72, 1.) and adjust the tensioning roller with the screw (Fig. 72, 2.):

A Rotation clockwise: sanding belt runs to the front

B Rotation counterclockwise: sanding belt runs to the back

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Fig. 72 Adjust the sanding belt tracking at the setting

screw of the drive unit (see description on the left).

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MAINTENANCE WORK AND REPLACEMENT OF WEARING PARTS

7 If the sanding belt tracking is seen to be correct after adjusting

once, tighten the lock nut again (Fig. 72, 3.).

CAUTION!

RISK OF INJURY and RISK OF PROPERTY DAMAGE from rotating parts of the machine:

If the lock nut at the upper part of the drive unit is not tightened, it will loosen during operation of the machine and falls on rotating parts!

ATTENTION!

If the lock nut at the upper part of the drive unit is not tightened, the tensioning roller can move out of place! This cause negative effects to the sanding result!

8 If the sanding belt tracking is seen to be not correct after

adjusting once, repeat the process.

9 After successful setting of the sanding belt tracking mount

the side cover (Fig. 71).

7.4 CHECKING THE MACHINE SETTING

ATTENTION!

The best working result is achieved when the sanding drum sands centrally! Only with this setting is it possible to avoid the belt from sanding too deep on one side, resulting in unwanted sanding marks!

From time to time, or as a result of incorrect transportation, it is possible for the machine to become incorrectly adjusted. Incorrect adjustment is indicated by one-sided sanding of the sanding drum, which can lead to sanding tracks and complaints. Correction of machine setting is performed as follows:

1 Switch off the machine and pull the power plug out of the

socket!

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2 Tilt the machine backwards over the safety guards so that you

can see the wheel bearings (Fig. 73). Ensure that the machine

is standing securely!

3 The wheel on the belt guard side can be adjusted by releasing

the tension screw. The other wheel is firmly fixed using a screw.

4 For setting, first take the actual position of the adjustable

wheel using the setting fixture (right-hand wheel seen from below). Position the fixture against the machine housing in such a way that it rests not only against the machine housing on both sides, but also at the adjustable wheel. If necessary, turn the threaded pin of the setting device. To do this, release the nut of the setting fixture (Fig. 74).

Fig. 73 To check the machine setting, tilt the machine

backwards. Ensure that the machine is standing

securely!

5 If the machine is sanding more heavily on the belt guard side

(A in Fig. 75), the wheel must be adjusted away from the belt guard (direction of B in Fig. 75).

If the machine is sanding more heavily on the side cover side

(C in Fig. 75), the wheel must be adjusted towards the belt guard (direction of D in Fig. 75).

Now adjust the threaded pin of the setting device in the

relevant direction by the required amount.

6 Release the clamping screw at the wheel clamp of the

adjustable wheel (Fig. 76) and place the setting fixture against the machine housing again.

7 Set the wheel in the required position by means of the setting

fixture so that the wheel lining just still makes contact with the threaded pin when turning, and tighten the clamping screw again.

8 Carry out a sanding test to check whether the machine is

now correctly adjusted. If not, the process will have to be repeated.

Fig. 74 Take the actual position of the adjustable wheel

using the setting fixture (right-hand wheel seen from below).

Fig. 75 If the machine is sanding more on side A, the

wheel must be adjusted in the direction of B.

If the machine is sanding more on side C, the

wheel must be adjusted in the direction of D.

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Fig. 76 Release the screw on the right-hand wheel clamp.

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MAINTENANCE WORK AND REPLACEMENT OF WEARING PARTS

7.5 CHECKING THE DUST PICK-UP

In order to guarantee optimum dust pick-up for your safety and that of others, the following points must be observed:

• Always used original LÄGLER® dust bags!

• Never use damaged, washed, patched or in any other way repaired dust bags!

Fig. 77 The sealing felt must not demonstrate any signs

of damage, otherwise replace!

Fig. 78 Release the cover lock (1.), remove the side cover

(2.) and lower the tensioning roller by pulling up the operating lever (3.).

• Ensure that the sealing felt is not worn or damaged (Fig. 77)!

• Check the suction system for blockages or deposits!

7.6 REPLACEMENT OF SANDING DRUM

Use exclusively original LÄGLER® sanding drums (Part number in Section 11, Spare parts)!

1 Switch off the machine and pull the power plug out of the

socket!

2 Release the cover lock (Fig. 78, 1.) and remove the side cover

on the right of the machine housing (Fig. 78, 2.).

3 Pull the operating lever of the drive unit upwards (Fig. 78, 3.).

This will lower the tensioning roller.

4 Remove the sanding belt from the tensioning roller and the

sanding drum.

Fig. 79 Release the drum nut clockwise (left-hand

thread), if necessary by knocking gently with a soft hammer.

Never use a steel hammer!

5 Tilt the machine backwards over the safety guards (Fig. 73).

Ensure that the machine is standing securely!

6 Open the drum nut by turning the box wrench (see tool kit)

clockwise (left-hand thread) and unscrew the drum nut

(Fig. 79).

If necessary, take a soft hammer to help you loosen the nut.

Never use a steel hammer!

HUMMEL® 01.12.2012

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MAINTENANCE WORK AND REPLACEMENT OF WEARING PARTS

7 Turn the sanding drum in such a way that the groove is pointing

upwards to ensure that the parallel key is not lost (Fig. 80). Now pull the sanding drum out sideways out of the housing.

If the sanding drum is too stiff to move, use a lath (Fig. 81) to

dislodge it, so as not to damage the machine! Never attempt to loosen the sanding drum by hitting with a hammer!

8 Clean the shaft stump and oil it slightly.

9 Push on the new sanding drum. Pay attention to the parallel

key!

10 Perform the remaining assembly steps in reverse order.

7.7 REPLACEMENT OF TENSIONING ROLLER

Use exclusively original LÄGLER® tensioning rollers (Part number in Section 11, Spare parts)!

1 Remove the drive unit ( Section 7.1.1, Dismantling and

cleaning of drive unit).

2 Clamp the drive unit in a vise. If you are unable to reach the

lock nuts with the closed-mouth wrench, screw the lever into the crank again and turn it downwards (Fig. 82, 1.) so that the top of the drive unit is lifted up.

3 Remove the two fixing screws in the tensioning roller while

holding onto the locknuts with a closed-mouth wrench (Fig. 82, 2.).

Fig. 80 Turn the sanding drum in such a way that the

groove is pointing upwards to ensure that the parallel key is not lost.

Fig. 81 If the sanding drum is too stiff to be removed,

carefully lever it away with a lath.

Never use brute force!

4 Remove the tensioning roller and check the compression

spring. Should this be deformed, the compression spring (Part number in Section 11, Spare parts) must be renewed.

5 Clean the drive unit. Do not use any cleaning products which

contain solvents!

6 Insert the compression spring and the tensioning roller. Ensure

that the surfaces on the shaft ends of the tensioning roller are pointing upwards (Fig. 83)!

HUMMEL® 01.12.2012 English / Englisch

Fig. 82 Turn the crank in the indicated direction (1.).

Remove the two fixing screws in the tensioning roller while holding onto the locknuts with a closed mouth wrench (2.).

Fig. 83 Insert the new tensioning roller, ensuring that the

surfaces on the shaft ends are pointing upwards!

Page 40

MAINTENANCE WORK AND REPLACEMENT OF WEARING PARTS

7 Tighten the screw of the unsprung bearing pedestal side

(Fig. 84, 1.).

8 Turn the screw on the sprung side of the tensioning roller

(Fig. 84, 2.) far enough so that the tensioning roller is positioned parallel to the upper part of the drive unit (Fig. 85).

9 Tighten the lock nuts of the fixing screws!

Fig. 84 Tighten the side without spring (1.) and then the

side with spring (2.), so that …

Fig. 85 … the tensioning roller is positioned parallel to

the top of the drive unit.

CAUTION!

RISK OF INJURY and RISK OF PROPERTY DAMAGE from rotating parts of the machine:

If the lock nuts of the fixing screws are not tightened, they will loosen during operation of the machine and fall on rotating parts!

ATTENTION!

If the lock nuts of the fixing screws are not tightened, the tensioning roller can move out of place! This cause negative effects to the sanding result!

10 Remount the drive unit ( Section 7.1.1, Dismantling and

cleaning of drive unit).

11 Check the sanding belt tracking (

Section 7.3.1, Checking

the sanding belt tracking).

HUMMEL® 01.12.2012

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MAINTENANCE WORK AND REPLACEMENT OF WEARING PARTS

7.8 REPLACEMENT OF REAR WHEEL

Use exclusively original LÄGLER® rear wheels (Part number in Section 11, Spare parts)!

7.8.1 REPLACEMENT OF REAR WHEEL ONLY

1 Switch off the machine and pull the power plug out of the

socket!

2 Tilt the machine forward over the bracket (Fig. 86). Ensure

that the machine is standing securely (Fig. 87)!

3 Release the screw in the centre of the wheel and remove the

screw, washers and nut (Fig. 88). Ensure that you do not lose the nut.

4 Pull the back wheel off the tail axle housing.

5 Push the new back wheel onto the tail axle housing.

6 Insert the nut in the hexagonal recess of the tail housing and

hold onto the nut. Mount the washers and the screw.

7.8.2 REPLACEMENT OF COMPLETE REAR WHEEL ASSEMBLY

1 Switch off the machine and pull the power plug out of the

socket!

2 Tilt the machine forward over the bracket (Fig. 86). Ensure

that the machine is standing securely (Fig. 87)!

3 Release the screw which fastens the tail axle of the rear

wheel in the machine housing (Fig. 89).

Fig. 86 Pull the power plug out of the socket! Tilt the

machine forward over the bracket.

Fig. 87 Ensure that the machine is standing securely!

4 Pull the complete rear wheel assembly out of the machine

housing (Fig. 89).

5 Mount the complete new back wheel in reverse sequence and

fasten it again in the machine housing, aligning the clamping surface of the tail axle towards the screw (Fig. 89).

HUMMEL® 01.12.2012 English / Englisch

Fig. 88 Remove the screw with the washers and nut in the

centre of the wheel and take off the back wheel. Assemble in reverse sequence.

Fig. 89 Release the screw and pull the complete rear

wheel assembly out of the machine housing.

When mounting, align the clamping surface of the

tail axle towards the screw.

Page 42

MAINTENANCE WORK AND REPLACEMENT OF WEARING PARTS

Fig. 90 Tilt the machine backwards. Ensure that the

machine is standing securely!

7.9 REPLACEMENT OF LATERAL WHEELS

Use exclusively original LÄGLER® lateral wheels (Part number in Section 11, Spare parts)!

1 Switch off the machine and pull the power plug out of the

socket!

2 Tilt the machine backwards over the safety guards (Fig. 90).

Ensure that the machine is standing securely!

3 Release the screw in the centre of the wheel and remove the

screw and washers (Fig. 91). Before removing the left lateral wheel open the belt guard (Fig. 94).

4 Pull the wheel off the wheel lever.

Fig. 91 Remove the screw and washers in the centre of

the wheel and remove the lateral wheel. Assemble the new wheel in reverse sequence.

5 Push the new wheel onto the wheel lever.

6 Mount the washers and the screw.

7 Tighten the screw again.

ATTENTION!

The lateral wheels must always be exchanged in pairs!

TIP:

As it is so easy and quick to exchange the lateral wheels and the back wheel, it is advisable to use a second set of wheels when performing rough work.

7.10 REPLACEMENT AND TENSIONING OF V-BELTS

7.10.1 REPLACEMENT OF V-BELTS

Fig. 92 Lift the sanding drum off the floor by turning the

lowering lever at the handle upwards.

Use exclusively original LÄGLER® V-belts (Part number in Section 11, Spare parts)!

1 Switch off the machine and pull the power plug out of the

socket!

2 Lift the sanding drum off the floor by turning the lowering

lever at the handle upwards (Fig. 92).

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MAINTENANCE WORK AND REPLACEMENT OF WEARING PARTS

3 Loosen the two motor nuts at the motor bearing bracket

(Fig. 93).

4 Open the belt guard (Fig. 94).

5 Release the tension of the V-belts by turning the eye bolt at

the motor counterclockwise (Fig. 95).

6 Open the clamping screw of the belt tensioner for the suction

V-belt (Fig. 96, 1.)

7 Turn the belt tensioner clockwise to release the tension of

the suction V-belt (Fig. 96, 2.).

CAUTION!

Fig. 93 Loosen the two motor nuts.

RISK OF INJURY:

During dismantling and mounting the V-belts, take care of your fingers danger of crushing!

8 Turn the motor pulley and allow the suction V-belt to run off

the motor pulley (Fig. 97).

Fig. 94 Pull the power plug out of the socket and open

the belt guard.

Fig. 95 Release the tension of the V-belts by turning the

eye bolt at the motor counterclockwise.

HUMMEL® 01.12.2012 English / Englisch

Fig. 96 Open the clamping screw of the belt tensioner (1.)

and release the tension of the suction V-belt (2.).

Fig. 97 Remove the suction V-belt.

Page 44

MAINTENANCE WORK AND REPLACEMENT OF WEARING PARTS

Fig. 98 Allow the drive V-belt to run off the lower pulley.

If necessary, use the box wrench (see tool kit) to help you. Turn the pulley exclusively clockwise in order not to loosen the nut!

9 Turn the lower pulley and allow the drive V-belt to run off the

lower pulley (Fig. 98).

If necessary, use the box wrench (see tool kit) to turn the

lower pulley exclusively clockwise!

ATTENTION!

Only turn the nut with the box wrench at the lower pulley clockwise, as otherwise the nut will work loose (left-hand thread)!

10 Mount the new V-belts and tension them ( Section 7.10.2,

Tensioning of V-belts).

7.10.2 TENSIONING OF V-BELTS

Fig. 99 Loosen the two nuts at the eye bolt at the motor.

Fig. 100 Tension the drive V-belt by turning the eye bolt at

the motor clockwise (1.). Correct tension of the drive V-belt: The V-belt should be compressed approx. 1 cm

(3/8“) (2.).

In case to retension the V-belts only, point 1 to 4 in Section 7.10.1, Replacement of V-belts must be done first. Only then proceed as follows.

1 Open the clamping screw of the belt tensioner for the suction

V-belt (Fig. 96, 1.).

2 Turn the belt tensioner clockwise to release the tension of

the suction V-belt (Fig. 96, 2.).

3 Loosen the two nuts at the eye bolt at the motor (Fig. 99) and

turn them upwards.

4 Tension the drive V-belt for the sanding drum by turning the

eye bolt at the motor clockwise (Fig. 100, 1.).

Correct tension of the drive V-belt: The slack on the V-belt should be approx. 1 cm (3/8“) if com-

pressed with normal effort (Fig. 100, 2.).

5 First tighten the lower nut (Fig. 101, 1.), then the upper nut

(Fig. 101, 2.) at the eye bolt at the motor.

Fig. 101 First tighten the lower nut (1.), then the upper nut

(2.) at the eye bolt at the motor.

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MAINTENANCE WORK AND REPLACEMENT OF WEARING PARTS

ATTENTION!

Orient the belt tensioner to the fan pulley! Move the belt tensioner accordingly (Fig. 102)! A wrong orientation from belt tensioner to fan pulley increase the wearing of fan axle, pulleys and V-belt extensive (Fig. 103)! Then these parts must be replaced significant more often!

6 Turn the belt tensioner counterclockwise to tension the suc-

tion V-belt (Fig. 104, 1.). Keep the belt tensioner in position and tighten the clamping screw at the belt tensioner carefully at the same time (Fig. 104, 2.).

Correct tension of the suction V-belt: The slack on the V-belt should be approx. 1 cm (3/8“) if com-

pressed with normal effort (Fig. 104, 3.).

7 Tighten the two motor nuts (Fig. 105).

8 Close the belt guard (Fig. 106).

ATTENTION!

• Never tension the V-belts excessively! This can cause damage to the V-belts and ball bearings!

• Check the tension of the V-belts after a while! Retension the V-belts if necessary!

Fig. 102 Orient the belt tensioner to the fan pulley. Move

the belt tensioner accordingly.

Fig. 103 Avoid position A and B of the belt tensioner! Otherwise the wearing of fan axle, pulleys and

V-belt increase extensive!

HUMMEL® 01.12.2012 English / Englisch

Fig. 105 Tighten the two motor nuts.

Fig. 104 Tension the suction V-belt by turning the belt

tensioner counterclockwise (1. and 2.). Correct tension of the suction V-belt: The V-belt should be compressed approx. 1 cm

(3/8“) (3.).

Fig. 106 Close the belt guard.

Page 46

REGULAR MAINTENANCE AND TESTING

Regular maintenance and testing

in accordance with

accident prevention regulations

WARNING!

Tests and testing intervals must comply with and be performed in accordance with the applicable regulations and legal requirements in your country!

The electrical operating equipment and machine parts must be inspected at least once a year by a qualiﬁ ed electrician with respect to electrical and mechanical safety, then be repaired as required. Afterwards, the operational safety must be confirmed by the attachment of an inspection label on the machine (Fig. 107).

The elements required for the dust suction system must be checked at least once per year by a qualiﬁ ed expert and repaired as required. The functional efficiency must also be confirmed.

Fig. 107 The inspection label on the belt guard confirms the

electrical and mechanical safety of the machine.

WARNING!

In order to ensure the safety of the machines and equipment (= working equipment), the German Ordinance on Industrial Safety and Health (BetrSichV) must be complied with in Germany!

Ensure that only original LÄGLER® spare parts are used for maintenance work! You should only allow the customer service

work to be conducted by LÄGLER® or an authorized LÄGLER® service centre!

The service passport in these operating instructions (Section 12) documents when and where your machine was serviced.

Enter the serial number and the year of manufacture of your machine on the back cover of these operating instructions (please see the type plate)! If you do not do this, your service passport is invalid!

Make sure that the maintenance tasks in the service passport are confirmed by filling in a corresponding field with the date, stamp and signature.

REGULATIONS VALID IN GERMANY

The German Ordinance on Industrial Safety and Health (BetrSichV) requires every employer to define the testing intervals on the work equipment they provide according to a risk analysis and to document all of this.

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REGULAR MAINTENANCE AND TESTING

EXCERPT FROM THE BGV A3

§ 5 Inspections

(1) The employer must ensure that the proper condition of the

electrical systems and equipment is inspected

1. before using the equipment for the first time and after an alteration or repair before being used again by an electrician or under the supervision of an electrician and

2. at regular intervals.

The intervals are to be calculated in such a manner that defects which must be handled are detected in a timely manner. (2) The electrical engineering regulations relevant to the inspection

are to be followed.

(3) Upon request by the professional association, an inspection

log with specific entries is to be maintained.

(4) The inspection before the first commissioning as per paragraph

1 is not required if the employer receives confirmation from the manufacturer or installer that the electrical systems and equipment have been correspondingly procured in accordance with these accident prevention guidelines.

NOTE:

• All LÄGLER® machines and electrical equipment are subjected to an electrical inspection as well as a thorough visual and functional test before they leave the factory.

• A recurring inspection of the machines and electrical equipment must be conducted in Germany at certain intervals.

• LÄGLER® recommends using the guidelines of BGV A3 for inspections and inspection intervals.

• You can, of course, arrange for repairs and recurring inspections of LÄGLER® machines to be conducted by the LÄGLER® service department.

Table 1B: Recurring inspections of portable electrical equipment:

Systems/equipment (which are to be inspected)

• portable electrical equipment (insofar as is used)

• extension and device connection cables with plugs

• connection cables with plugs

• movable cables with plugs and fixed connections

Inspection interval Every 6 months as a reference value, 3 months on construction sites*).

If an error rate of less than 2% is reached during the inspection, the inspection interval can be extended to a maximum of 1 year (valid for machines on construction sites, in production facilities and workshops).

*) See the BG information “Selection and Operation of Electrical Systems and

Equipment on Construction Sites” (BGI 608) for more details.

Type of inspection

The proper condition of the machines and equipment must be inspected.

Inspector

Electricians or persons trained in electrical engineering when using suitable measurement and inspection devices.

HUMMEL® 01.12.2012 English / Englisch

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Causes of faults

WARNING!

RISK OF DEATH from electrical shock:

Work on the electrical equipment is to be conducted exclusively by a qualified electrician! The machine must be switched off and the power plug removed from the socket during this work! The circuit diagram valid for your machine is located in the motor switch box!

RISK OF INJURY due to unsuitable parts:

Make sure that only original LÄGLER spare parts and original LÄGLER® accessories are used!

CAUSES OF FAULTS

This section shows you how to remedy possible malfunctions. If none of the measures listed here are successful, please contact our service department, your retailer or your importer.

THE MACHINE DOES NOT RUN

The machine does not start

• The machine is not connected to the electrical network. Check the following items:

- Is the motor cable connected to the extension cable?

- Is the extension cable inserted into the power socket?

• The power socket is not properly connected. This error must be corrected by a professional.

• The electrical safety device of the electrical network interrupted the electrical circuit, e.g. because

- too many electricity consumers are connected to the same

electrical circuit,

- improper electrical installation.

The causes for the error must be repaired by an expert.

• The electrical network is not providing sufficient voltage (undervoltage). Use a transformer if necessary (e.g. LÄGLER® part number 708.00.00.100 for 230 volts).

• The temperature switch in the motor has switched off the machine because

- one or more power cables have a total length of more than

20 m

- the power cables has wire cross-sections which are too

small:

at mains voltage 220 V or 230 V are the wire cross-sections

smaller than 2.5 mm²

at mains voltage 400 V are the wire cross-sections smaller

than 1.5 mm²

- or too much pressure was applied to the sanding drum. The motor must cool off and the causes for the problems named above must be remedied.

• An electrical component of the machine (e.g. capacitors, contactor, cable, switch) is defective and must be inspected by a qualified electrician and replaced if necessary.

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CAUSES OF FAULTS

The machine attempts to start up but is not able to do so

• At low temperatures: The machine is too cold and must be heated up to room temperature in a warm room.

• Cables which are too thin or too long are used for the electrical connection:

Power cables with wire cross-sections which are too small

(mains voltage 220 V or 230 V smaller than 2.5 mm², mains voltage 400 V smaller than 1.5 mm²) or with a total length of more than 20 m lead to a loss of power and are not allowed for safety reasons!

• The electrical network is not providing sufficient voltage (undervoltage). Use a transformer if necessary (e.g. LÄGLER® part number 708.00.00.100 for 230 volts).

• The V-belts are too tight and must be loosened ( Sec- tion 7.10, Replacement and tensioning of V-belts).

THE MACHINE RUNS BADLY

The machine runs, but has no or very little sanding power capacity

• The sanding medium is incorrect or dull and must be replaced ( Section 5.2, Changing the sanding belt).

• At low temperatures: The machine is too cold and must be heated up to room temperature in a warm room.

• Cables which are too thin or too long are used for the electrical connection:

Power cables with wire cross-sections which are too small

• The electrical network is not providing sufficient voltage (undervoltage). Use a transformer if necessary (e.g. LÄGLER® part number 708.00.00.100 for 230 volts).

• The V-belts are not tight enough and must be tightened a bit ( Section 7.10, Replacement and tensioning of V-belts).

• The sanding pressure do not suit to the grit grade of the sanding belt and must be corrected ( Section 5.3, Regulating the sanding drum pressure).

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CAUSES OF FAULTS

The machine vibrates intensely and runs noisily

• The sanding medium does not have the proper tension. The tension must be corrected ( sanding belt).

• The sanding medium is damaged or incorrect and must be replaced (

• The sanding belt tracking is incorrect and must be adjusted ( Section 7.3, Checking and setting the sanding belt tracking).

• The sanding drum is dirty or damaged and must be replaced ( Section 7.6, Replacement of sanding drum).

• The tensioning roller of the drive unit is dirty or damaged and must be replaced ( Section 7.7, Replacement of tensioning

roller).

Section 5.2, Changing the sanding belt).

Section 5.2, Changing the

• A V-belt is dirty, damaged or worn-out and must be replaced ( Section 7.10, Replacement and tensioning of V-belts).

• A pulley is dirty or worn-out and must be cleaned or replaced.

• There are clogged materials and deposits in the machine that must be removed.

THE MACHINE RUNS BUT CREATES A GREAT DEAL OF DUST

• The dust bag is more than one third full and must be emptied ( Section 5.4, Emptying the dust bag).

• The dust bag is not correctly attached or is damaged and must be replaced ( Section 4.1, Preparing the machine for operation).

• The sealing felt at the machine housing is damaged and must be replaced ( Section 7.5, Checking the dust pick-up).

• The dust suction system is clogged up and must be cleaned.

• The suction V-belt is not tight enough and must be tightened or damaged and must be replaced ( Section 7.10, Replace- ment and tensioning of V-belts).

• The side cover is not mounted at the machine and must be mounted ( Fig. 13).

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CAUSES OF FAULTS

SANDING PROBLEMS

Waves, strips, grooves

• The floor was not vacuumed before sanding. The floor must always be vacuumed thoroughly before the first and after each additional sanding operation.

• The sanding drum was not lifted from the floor while the machine was switched on or off. Always lift the sanding drum off the floor before switching on or off the machine ( Section 4.3, Switching on the machine and Section 4.4, Switching off the machine).

• The sanding medium does not have the proper tension. The tension must be corrected ( Section 5.2, Changing the sanding belt).

• The sanding medium is damaged or incorrect and must be replaced ( Section 5.2, Changing the sanding belt).

• The sanding pressure do not suit to the grit grade of the sanding belt and must be corrected ( Section 5.3, Regulating the sanding drum pressure).

• The machine setting is not correct and must be adjusted. The sanding drum must sands centrally ( Section 7.4, Checking the machine setting).

• The sanding drum is dirty or damaged and must be replaced ( Section 7.6, Replacement of sanding drum).

• The tensioning roller of the drive unit is dirty or damaged and must be replaced ( Section 7.7, Replacement of tensioning roller).

• The wheels are dirty or damaged and must be cleaned or replaced ( Section 7.8, Replacement of rear wheel and Section 7.9, Replacement of lateral wheels).

• A V-belt is dirty, damaged or worn-out and must be replaced ( Section 7.10, Replacement and tensioning of V-belts)

• A pulley is dirty or worn-out and must be cleaned or replaced.

• The lowering rod linkage is running poorly, catching on something or getting stuck. Free movement is necessary.

• The machine is being moved too slowly and must be sped up.

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CAUSES OF FAULTS

• Too much pressure is placed on the sanding drum while sanding.

The following causes must be eliminated:

- additional weight is on the machine,

- the rear part of the machine is lifted on with the handle

while sanding,

- the lowering lever at the handle is pressed downwards while

sanding.

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Page 53

back-up fuse: 16 A power supply: 230V/50CPS

8.6 kW

selector switch

operation

temperature

switch

motor 2.2 kW

230V/50CPS

start

operation

stop

test

HUMMEL + ELF: single-phase AC motor

2,2kW/230V/50CPS

C = starting capacitorA C = running capacitor

Ha = main winding Hi = auxiliary winding

Phone: 0049 - 7135 - 98 90 - 0 Fax: 0049 - 7135 - 98 90 - 98

e-mail: [email protected] Internet: http://www.laegler.com

K1M

N 02

2 11

A A

4 3

K1M

40 Fm

60 Fm

K1M

02.03.1999

EUGEN LÄGLER GMBH Kappelrain 2 D-74363 Güglingen-Frauenzimmern

CIRCUIT DIAGRAMS

The circuit diagram valid for your machine is located in the motor switch box.

HUMMEL® 01.12.2012 English / Englisch

Page 54

K1M

N 02

2 11

A A

4 3

K1M

40 Fm

60 Fm

K1M

17.12.2009

EUGEN LÄGLER GMBH Kappelrain 2 D-74363 Güglingen-Frauenzimmern

back-up fuse: 20 A power supply: 220 + 230V/60CPS

8.6 kW

selector switch

operation

temperature

switch

motor 2.2 kW 220+230V/60CPS

start

operation

stop

test

fuse

6.2 A

fuse

6.2 A

HUMMEL + ELF: single-phase AC motor

2.2kW/220V/60CPS

2.2kW/230V/60CPS

C = starting capacitorA C = running capacitor

Ha = main winding Hi = auxiliary winding

e-mail: [email protected] Internet: http://www.laegler.com

Phone: 0049 - 7135 - 98 90 - 0 Fax: 0049 - 7135 - 98 90 - 98

CIRCUIT DIAGRAMS

The circuit diagram valid for your machine is located in the motor switch box.

HUMMEL® 01.12.2012

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Page 55

K1M

N 02

2 11

A A

3 4

K1M

40 Fm

130 Fm

K1M

02.03.1999

EUGEN LÄGLER GMBH Kappelrain 2 D-74363 Güglingen-Frauenzimmern

back-up fuse: 20 A power supply: 220V/60CPS

8.6 kW

selector switch

operation

temperature

switch

motor 2.9 kW 220V/60CPS USA version

start

operation

stop

test

fuse

6.2 A

fuse

6.2 A

HUMMEL + ELF: single-phase AC motor

2.9kW/220V/60CPS

USA version

C = starting capacitorA C = running capacitor

Ha = main winding Hi = auxiliary winding

S0 = emergency switch

e-mail: [email protected] Internet: http://www.laegler.com

Phone: 0049 - 7135 - 98 90 - 0 Fax: 0049 - 7135 - 98 90 - 98

CIRCUIT DIAGRAMS

The circuit diagram valid for your machine is located in the motor switch box.

HUMMEL® 01.12.2012 English / Englisch

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SPARE PARTS

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Page 57

SPARE PARTS

Item Part number Description

4 0125.1008.000 Washer 11 0980.1008.000 Nut 21 0912.1008.025 Screw 22 100.50.00.100 Belt guard, complete 23 6797.1008.000 Washer 24 0933.1008.016 Screw 25 000.01.40.001 O-ring 26 100.50.04.105 Screw stud 27 7500.1005.012 Screw 28 100.01.05.105 Cover fastener 29 100.58.00.200 Belt tensioner, complete 30 100.01.00.100 Housing 31 000.20.45.083 Wing nut 33 0931.1008.075 Screw 36 100.33.01.100 Bracket 37 0933.1008.022 Screw 38 100.33.02.100 Grip 39 7337.1005.033 Rivet 40 100.01.01.100 Bumper felt 41 100.01.02.100 Sealing felt 42 9021.1005.000 Washer 43 0933.1006.014 Screw 44 0125.1006.000 Washer 45 100.60.00.200 Wall-protecting roller with holder 46 100.60.01.100 Holder for wall-protecting roller 47 0934.1006.000 Nut 49 100.60.02.200 Wall-protecting roller 50 0912.1006.030 Screw 51 000.43.10.252 Plastic bushing 52 7984.1008.016 Screw 53 100.44.00.100 Safety guard, complete 54 100.44.01.100 PVC tube 55 100.01.03.100 Side cover 56 100.01.08.200 Collar nut, complete 59 100.01.30.100 Guide roller, complete

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SPARE PARTS

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SPARE PARTS

Item Part number Description

1 100.00.80.105 Dust bag HUMMEL

3 000.17.21.081 Fixing cap

4 0125.1008.000 Washer

5 000.20.56.351 Ball knob

6 100.20.18.200 Lever

7 0471.0015.000 Circlip 10 0580.1008.000 Thread eye 11 0980.1008.000 Nut 12 00.000.41.002 Strain relief ring 13 100.20.26.100 Cable support, complete 15 100.20.01.200 Guide tube

102.20.01.200 Guide tube USA

100.20.00.200 Guide tube, complete

102.20.00.200 Guide tube USA, complete

100.21.00.200 Guide tube long, complete 16 100.20.24.100 Upper rod, complete 62 100.20.23.200 Adjusting ring, complete 65 000.20.31.351 Handle 66 0988.0015.005 Washer 67 0914.0008.012 Grub screw 68 100.20.17.200 Axle for handle 69 000.17.20.081 Quick-fixing-fastener

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SPARE PARTS

HUMMEL® 01.12.2012

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Page 61

SPARE PARTS

Item Part number Description

1 0965.1006.870 Screw 2 100.08.01.200 Sealing ring 3 100.08.00.100 Fan housing 4 100.10.00.200 Fan insert, complete 5 100.14.00.100 Intake duct 6 0933.1008.022 Screw 7 6797.1008.000 Washer

8 0912.1008.018 Screw 13 000.20.46.062 Wing screw 14 0125.1006.000 Washer 16 100.04.09.100 Lower rod, complete 17 000.17.20.081 Quick-fixing-fastener 18 100.04.01.200 Pivot pin 19 100.04.25.100 Spring with screw, complete 20 100.04.06.200 Notch plate 21 7500.1005.012 Screw 22 100.04.02.100 Spring tensioner, complete 23 100.05.00.200 Lateral wheel, complete 24 0931.1008.050 Screw 25 100.04.00.100 Lifting fixture 26 0125.1008.000 Washer 27 6330.1008.000 Nut 34 000.50.12.061 Nut 40 100.05.04.200 Wheel arm 41 100.05.29.100 Lateral wheel 42 000.10.10.085 Washer 43 7984.1008.012 Screw 45 100.18.00.300 Rear wheel, complete 46 0934.1008.000 Nut 47 100.18.18.300 Tail axle housing, complete 48 100.18.29.105 Rear wheel (from year of manufacture 2002)

100.18.09.200 Rear wheel (up to year of manufacture 2001) 49 0912.1008.040 Screw 50 0914.0008.012 Grub screw

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SPARE PARTS

up to May 2000

from May 2000

Please state the machine number with each order!

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SPARE PARTS

Item Part number Description

1 100.45.00.100 Drive unit, complete 2 0912.1006.050 Screw 3 100.45.12.105 Tensioning roller 4 000.31.13.021 Pressure spring 5 100.45.01.105 Guide roller 6 0980.1006.000 Nut 7 0125.1008.000 Washer 8 0912.1008.018 Screw

9 100.45.81.105 Collar 10 000.61.10.363 Cable tie 12 100.45.20.100 Crank 13 100.45.24.105 Bearing bush 14 0988.0018.005 Washer 15 0471.0018.000 Circlip 16 000.20.32.104 Operating lever 18 100.45.17.100 Clip 19 0931.1008.060 Screw 20 0980.1008.000 Nut 21 100.45.61.205 Screw 22 100.45.37.100 Double arm, complete 23 100.02.05.100 Nut, right-hand thread 24 100.36.00.100 V-belt pulley 25 0472.0047.000 Circlip 26 6005.0025.205 Ball bearing 28 6885.0606.018 Parallel key 29 100.02.01.100 Sanding shaft 30 6885.0606.040 Parallel key 32 100.02.04.105 Spacer ring 34 100.02.03.105 Slide ring 35 000.11.35.102 Shaft seal 36 120.40.00.100 Sanding drum HUMMEL

120.41.00.100 Sanding drum HUMMEL®, hard rubber cover 37 100.02.06.100 Nut, left-hand thread 46 100.45.45.100 Pressure spring 60 0472.0052.000 Circlip 61 6205.0025.205 Ball bearing 62 6885.0606.010 Parallel key 63 100.02.01.200 Sanding shaft 64 6885.0606.025 Parallel key 65 100.02.03.200 Spacer ring 66 000.11.40.102 Shaft seal

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SPARE PARTS

Item Part number Description

1 100.65.00.100 Motor, 230 V / 50 CPS / 2.2 kW

101.65.00.100 Motor, 230 V / 60 CPS / 2.2 kW

102.65.00.100 Motor, 220 V / 60 CPS / 2.9 kW, USA

105.65.00.100 Motor, 400 V / 50 CPS / 4.0 kW, three-phase current 2 000.70.17.092 V-belt 3 000.70.10.067 V-belt 4 0912.1008.020 Screw 5 0127.1008.000 Spring washer 6 100.65.29.200 Motor bearing bracket 7 0933.1008.020 Screw 9 100.65.30.100 Motor nut

10 100.65.25.100 Motor mounting 11 100.65.09.100 Fan cover 12 7500.1005.006 Screw 13 0471.0030.000 Circlip 14 100.65.08.105 Fan wheel 16 6885.0807.020 Parallel key 17 6885.0606.025 Parallel key 18 100.65.06.100 Motor pulley 19 000.10.10.061 Washer 20 0912.1006.014 Screw 21 100.65.80.205 Eye bolt 22 100.65.35.100 Motor tensioner 23 0933.1008.022 Screw 26 100.65.75.100 Motor cable 3 x 2.5 mm² (from year of manufacture 2008)

000.65.43.251 Motor cable 3 x 2.5 mm² (up to year of manufacture 2007)

102.65.75.100 Motor cable 3 x 2.5 mm², USA (from year of manufacture 2008)

000.65.43.257 Motor cable 3 x 2.5 mm², USA (up to year of manufacture 2007)

105.65.75.100 Motor cable 5 x 1.5 mm² for three-phase AC motor (from year of manufacture 2008)

000.65.45.151 Motor cable 5 x 1.5 mm² for three-phase AC motor (up to year of manufacture 2007)

27 100.65.40.200 Switch box, 230 V / 50 CPS

102.65.40.200 Switch box, 220-230 V / 60 CPS + three-phase current

28 000.65.10.041 Running capacitor 40 µF 29 000.65.62.211 Switch button 30 000.65.60.253 Switch

000.65.60.401 Switch for three-phase AC motor

31 000.65.10.061 Starting capacitor 60 µF

000.65.10.131 Starting capacitor 130 µF, USA

32 000.65.20.035 Contactor

000.65.20.032 Contactor complete for three-phase AC motor

33 102.65.60.200 Emergency switch USA, complete 34 000.65.62.221 Red button for emergency switch USA 35 000.65.25.020 Lamp red for three-phase AC motor 36 000.65.20.220 Relay for three-phase AC motor 37 100.65.14.105 Sealing plate 38 000.65.12.091 Discharging resistor 39 000.68.60.207 Nut (from year of manufacture 2008)

000.68.60.163 Nut (up to year of manufacture 2007)

40 100.65.47.100 Cover with seal

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SPARE PARTS

Item Part number Description

2 000.01.40.110 MultiClip 3 000.65.53.251 Extension cable 3 x 2.5 mm², 10 m long

000.65.53.252 Extension cable 3 x 2.5 mm², 20 m long

000.65.55.151 Extension cable 5 x 1.5 mm², 10 m long, for three-phase AC motor 4 000.01.20.010 Respiratory protection mask P3 5 000.01.50.010 Safety belt 6 000.95.21.103 Closed mouth wrench 10/13 mm 7 000.95.11.171 Open mouth wrench 17 mm 8 000.93.11.061 Hexagonal socket screw wrench 6 mm 9 000.93.11.051 Hexagonal socket screw wrench 5 mm

10 000.93.11.041 Hexagonal socket screw wrench 4 mm 11 100.00.50.100 Setting fixture 12 100.00.45.105 Box wrench 13 000.01.30.011 Tool bag, empty

100.98.00.100 Tool bag, complete

20 720.00.00.200 Trolley TRANSCART, complete 21 000.01.10.011 Foldable earmuff type MUSIMUFF with FM radio 22 000.01.10.021 Foldable earmuff type POCKET 23 000.01.65.020 Safety switch PRCD-S (for German mains supply) 24 100.00.55.100 Carrying handle HUMMEL 25 701.10.00.100 Impact tool 26 702.00.00.200 Parquet layer tool ZUGEISEN, small 27 703.00.00.200 Parquet layer tool ZUGEISEN, broad 30 720.10.00.200 Accessories TRANSCART 31 720.05.00.205 Wheel TRANSCART 40 000.10.42.240 Milling drum 200 mm width, complete with accessories 41 900.02.45.105 Carbide tool (10 pcs. per box) 42 900.02.47.105 Screw for blade 43 000.10.42.241 Milling drum with carbide blades 44 000.10.42.243 Cutting depth adjustment, complete 45 000.91.30.151 Torx screwdriver T15

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NOTES

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NOTES

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NOTES

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SERVICE PASSPORT

Service passport

Please enter the serial number and the year of manufacture of your machine on the rear side of these operating instructions (see type plate)! Otherwise the service passport will not be valid!

This service passport is a document. Make sure that all the tests and maintenance work carried out on the machine are confirmed by the servicing company here.

Date of test and maintenance work:

Signature and company stamp

Date of test and maintenance work:

Signature and company stamp

Date of test and maintenance work:

Signature and company stamp

Date of test and maintenance work:

Signature and company stamp

Date of test and maintenance work:

Signature and company stamp

Date of test and maintenance work:

Signature and company stamp

Date of test and maintenance work:

Signature and company stamp

Date of test and maintenance work:

Signature and company stamp

Date of test and maintenance work:

Signature and company stamp

HUMMEL® 01.12.2012 English / Englisch

Signature and company stamp

Date of test and maintenance work:

Signature and company stamp

Date of test and maintenance work:

Signature and company stamp

Date of test and maintenance work:

Signature and company stamp

Date of test and maintenance work:

Signature and company stamp

Page 72

EU DECLARATION OF CONFORMITY

EU Declaration of conformity

for machines (EU Directive 2006/42/EC)

The manufacturer Eugen Lägler GmbH, Kappelrain 2, D-74363 Güglingen-Frauenzimmern Tel.: 0049 - 7135 - 98 90-0 · Fax: 0049 - 7135 - 98 90-98 E-Mail: [email protected] · http://www.laegler.com

certified herewith, that the machine Generic denomination: Floor sanding machine Function: Dry sanding of wooden floors Model: HUMMEL Serial number: See type plate Commercial name: Belt sanding machine

fulfils all the relevant provisions of the specified above European Directive.

The machine also fulfils all the relevant provisions of the European Directive

Electromagnetic compatibility (2004/108/EG).

The following harmonized standards have been applied: DIN EN ISO 12100: Safety of machinery - General principles for design - Risk assessment and risk reduction DIN EN 60204-1: Safety of machinery - Electrical equipment of machines - Part 1 DIN EN 55014-1: Electromagnetic compatibility - Requirements for household appliances, electric tools and similar

– 10 / December 1, 2012 – Printed on chlorine-free bleached paper. Part number 00.100.20.002

DIN EN 55014-2: Electromagnetic compatibility - Requirements for household appliances, electric tools and similar

DIN EN 61000-3-2: Electromagnetic compatibility (EMC) - Part 3-2: Limits DIN EN 61000-3-3: Electromagnetic compatibility (EMC) - Part 3-3: Limits

apparatus - Part 1

apparatus - Part 2

Güglingen-Frauenzimmern, December 1, 2012

Dipl.-Ing. (FH) Volker Wörner, Design Engineer Person Responsible for Documents Eugen Lägler GmbH, Kappelrain 2 D-74363 Güglingen-Frauenzimmern

HUMMEL

Serial number: Year of manufacture:

No guarantee is provided for the contents of these operating instructions. No liability is assumed for errors or damages which arise from the use of these operating instructions. Subject to changes.

Lagler HUMMEL Operation, Maintenance And Safety Manual

HUMMEL® - ASSEMBLIES

CONTENTS

INTRODUCTION

1.1 FEATURES OF THE MACHINE

1.2 DESCRIPTION OF THE MACHINE

1.3 INTENDED USE OF THE MACHINE

1.4 SAFETY DEVICES

HAZARD WARNINGS AND SAFETY INSTRUCTIONS

2.1 HAZARD WARNINGS

2.2 GENERAL SAFETY INSTRUCTIONS

Technical data

Commissioning

4.1 PREPARING THE MACHINE FOR OPERATION

4.2 CONNECTING THE POWER CABLE

4.3 SWITCHING ON THE MACHINE

4.3.1 MACHINES WITH SINGLE-PHASE AC MOTOR (MAINS VOLTAGE 230 V AND 220 V)

4.3.2 MACHINES WITH THREE-PHASE AC MOTOR (MAINS VOLTAGE 400 V)

4.3.3 GENERAL

4.4 SWITCHING OFF THE MACHINE

5.1 APPLICATION TIPS

5.2 CHANGING THE SANDING BELT

5.3 REGULATING THE SANDING DRUM PRESSURE

5.4 EMPTYING THE DUST BAG

TRANSPORT AND STORAGE

6.1 DISMANTLING THE MACHINE BEFORE TRANSPORTATION

6.2 ASSEMBLY AFTER TRANSPORTATION

6.3 STORAGE

MAINTENANCE WORK AND REPLACEMENT OF WEARING PARTS

7.1 CLEANING AND CARE INSTRUCTIONS

7.1.1 DISMANTLING AND CLEANING OF DRIVE UNIT

7.2 LUBRICATION

7.3 CHECKING AND SETTING THE SANDING BELT TRACKING

7.3.1 CHECKING THE SANDING BELT TRACKING

7.3.2 SETTING THE SANDING BELT TRACKING

7.4 CHECKING THE MACHINE SETTING

7.5 CHECKING THE DUST PICK-UP

7.6 REPLACEMENT OF SANDING DRUM

7.7 REPLACEMENT OF TENSIONING ROLLER

7.8 REPLACEMENT OF REAR WHEEL

7.8.1 REPLACEMENT OF REAR WHEEL ONLY

7.8.2 REPLACEMENT OF COMPLETE REAR WHEEL ASSEMBLY

7.9 REPLACEMENT OF LATERAL WHEELS

7.10 REPLACEMENT AND TENSIONING OF V-BELTS

7.10.1 REPLACEMENT OF V-BELTS

7.10.2 TENSIONING OF V-BELTS

REGULATIONS VALID IN GERMANY

Causes of faults

CIRCUIT DIAGRAMS

SPARE PARTS

SERVICE PASSPORT